Their old website still exists.
Go to www.okanaganrv.com and click on Construction. You can get all the construction details, specifically look at the floor to wall details. I have a 23ft OK trailer, 1997. That was before they changed to the name Eclipse. The floor construction is very rigid,none of the flexing in so many trailers with the 5/8" plywood floor. I am still very happy with mine after I got the leaks out of it. Don't let me scare you.
All the leaks were at the floor to wall joint.On the older models the wall was nailed to the side of the floor, instead of placed on top. On mine the putty strip was not properly filled and caused leakage around half the length of the trailer.Spent a whole winter drying this out with a 500 w. halogen lamp and fixing it. I have had no leaks since.
At the wall to floor corners you may want to remove some screws and check for corrosion and moisture. The condition of the screws will tell a lot about water penetration.
The walls in mine are the so called mesa panel, which is a corrugated fibreglass panel.All windows and doors were installed with a foam strip instead of putty,thus less foam in the hollow of the corrugation.
It did not leak but I did not trust it and replaced all with putty. You may want to check that. Other than that we are still happy with the trailer,the interior finish is good, we like the layout and am surprised that sofar every spring all the equipment works at first try after all those years. But that is a reflection on the equipment manufacturer and not on OK. By the way,all the decals are still in excellent shape, as opposed to a lot of complaints about decals disintegrating after a few years.
Enjoy the new toy. If you look after it, it will look after you.
I have the 26 RLS like yours 2007, first one made with the fiberglass front cap and crowned roof. We have been across Canada from Prince George to Newfoundland and into Labrador. No issues at all with the trailer structure and we were over some rough roads. Our traveling partners saw air under all four wheels twice when surprised by very rough highway bridges in Newfoundland. Only one minor problem with the slide, a shear pin broke once but no problem since. The converter packed it in, and the microwave blew literally, though used very little.
The only annoyance is the metal framing on the windows is not insulated so condensation develops on them when cold outside and mold will quickly form. Just have to keep wiped down.
We put a memory foam topper on the bed and carpet in the front pass through so the plastic tokes will not slide.